GODOT IS OPEN SOURCE

1 files changed, 166 insertions, 0 deletions

diff --git a/drivers/squish/simd_ve.h b/drivers/squish/simd_ve.h
new file mode 100644
index 0000000000..9a33955ffc
--- /dev/null
+++ b/drivers/squish/simd_ve.h
@@ -0,0 +1,166 @@
+/* -----------------------------------------------------------------------------
+
+	Copyright (c) 2006 Simon Brown                          si@sjbrown.co.uk
+
+	Permission is hereby granted, free of charge, to any person obtaining
+	a copy of this software and associated documentation files (the 
+	"Software"), to	deal in the Software without restriction, including
+	without limitation the rights to use, copy, modify, merge, publish,
+	distribute, sublicense, and/or sell copies of the Software, and to 
+	permit persons to whom the Software is furnished to do so, subject to 
+	the following conditions:
+
+	The above copyright notice and this permission notice shall be included
+	in all copies or substantial portions of the Software.
+
+	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+	OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+	IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
+	CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
+	TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
+	SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+	
+   -------------------------------------------------------------------------- */
+   
+#ifndef SQUISH_SIMD_VE_H
+#define SQUISH_SIMD_VE_H
+
+#include <altivec.h>
+#undef bool
+
+namespace squish {
+
+#define VEC4_CONST( X ) Vec4( ( vector float )( X ) )
+
+class Vec4
+{
+public:
+	typedef Vec4 Arg;
+
+	Vec4() {}
+		
+	explicit Vec4( vector float v ) : m_v( v ) {}
+	
+	Vec4( Vec4 const& arg ) : m_v( arg.m_v ) {}
+	
+	Vec4& operator=( Vec4 const& arg )
+	{
+		m_v = arg.m_v;
+		return *this;
+	}
+	
+	explicit Vec4( float s )
+	{
+		union { vector float v; float c[4]; } u;
+		u.c[0] = s;
+		u.c[1] = s;
+		u.c[2] = s;
+		u.c[3] = s;
+		m_v = u.v;
+	}
+	
+	Vec4( float x, float y, float z, float w )
+	{
+		union { vector float v; float c[4]; } u;
+		u.c[0] = x;
+		u.c[1] = y;
+		u.c[2] = z;
+		u.c[3] = w;
+		m_v = u.v;
+	}
+	
+	Vec3 GetVec3() const
+	{
+		union { vector float v; float c[4]; } u;
+		u.v = m_v;
+		return Vec3( u.c[0], u.c[1], u.c[2] );
+	}
+	
+	Vec4 SplatX() const { return Vec4( vec_splat( m_v, 0 ) ); }
+	Vec4 SplatY() const { return Vec4( vec_splat( m_v, 1 ) ); }
+	Vec4 SplatZ() const { return Vec4( vec_splat( m_v, 2 ) ); }
+	Vec4 SplatW() const { return Vec4( vec_splat( m_v, 3 ) ); }
+
+	Vec4& operator+=( Arg v )
+	{
+		m_v = vec_add( m_v, v.m_v );
+		return *this;
+	}
+	
+	Vec4& operator-=( Arg v )
+	{
+		m_v = vec_sub( m_v, v.m_v );
+		return *this;
+	}
+	
+	Vec4& operator*=( Arg v )
+	{
+		m_v = vec_madd( m_v, v.m_v, ( vector float )( -0.0f ) );
+		return *this;
+	}
+	
+	friend Vec4 operator+( Vec4::Arg left, Vec4::Arg right  )
+	{
+		return Vec4( vec_add( left.m_v, right.m_v ) );
+	}
+	
+	friend Vec4 operator-( Vec4::Arg left, Vec4::Arg right  )
+	{
+		return Vec4( vec_sub( left.m_v, right.m_v ) );
+	}
+	
+	friend Vec4 operator*( Vec4::Arg left, Vec4::Arg right  )
+	{
+		return Vec4( vec_madd( left.m_v, right.m_v, ( vector float )( -0.0f ) ) );
+	}
+	
+	//! Returns a*b + c
+	friend Vec4 MultiplyAdd( Vec4::Arg a, Vec4::Arg b, Vec4::Arg c )
+	{
+		return Vec4( vec_madd( a.m_v, b.m_v, c.m_v ) );
+	}
+	
+	//! Returns -( a*b - c )
+	friend Vec4 NegativeMultiplySubtract( Vec4::Arg a, Vec4::Arg b, Vec4::Arg c )
+	{
+		return Vec4( vec_nmsub( a.m_v, b.m_v, c.m_v ) );
+	}
+	
+	friend Vec4 Reciprocal( Vec4::Arg v )
+	{
+		// get the reciprocal estimate
+		vector float estimate = vec_re( v.m_v );
+		
+		// one round of Newton-Rhaphson refinement
+		vector float diff = vec_nmsub( estimate, v.m_v, ( vector float )( 1.0f ) );
+		return Vec4( vec_madd( diff, estimate, estimate ) );
+	}
+	
+	friend Vec4 Min( Vec4::Arg left, Vec4::Arg right )
+	{
+		return Vec4( vec_min( left.m_v, right.m_v ) );
+	}
+	
+	friend Vec4 Max( Vec4::Arg left, Vec4::Arg right )
+	{
+		return Vec4( vec_max( left.m_v, right.m_v ) );
+	}
+	
+	friend Vec4 Truncate( Vec4::Arg v )
+	{
+		return Vec4( vec_trunc( v.m_v ) );
+	}
+	
+	friend bool CompareAnyLessThan( Vec4::Arg left, Vec4::Arg right ) 
+	{
+		return vec_any_lt( left.m_v, right.m_v ) != 0;
+	}
+	
+private:
+	vector float m_v;
+};
+
+} // namespace squish
+
+#endif // ndef SQUISH_SIMD_VE_H